His relationship with Ren was very distance the first time they meant. He was a better player than Aichi by far and Aichi felt a difference in strength. When Aichi was upset for causing his team failures, Ren took a chance and told him that power can be his if he chose the path, he took back then. When they fought in the last battle, Aichi told him that he will not use PSY Qualia anymore and showed Ren what it meant to have true strength. When they met again after some months, their relationship became rather close. They now enjoy each other companies and likes to talk to each other even though Ren tends to switch subjects or sleeping on his feet.